20 Most Recent 1991 Chevrolet C1500 Questions & Answers

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The ignition switch is usually mounted to the steering column and is operated by a linkage rod.
NOTE On column-mounted ignition switches, don't confuse the switch with the lock cylinder and keys. The ignition switch is not normally visible. On some vehicles, the steering column support has to be removed and the column lowered to find the ignition switch. On others, the switch is accessible under the dash.



The ignition switch is operated by the key switch. Courtesy of Ford Motor Company. To replace the switch:

• Remove the ignition switch wiring harness.
• Unbolt it from its position.
• Bolt the new switch into position.
• Attach the witing harness.

Good luck (remember rated this help)

A picture has been sent to the emailyou listed.

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It sounds like current is feeding into the start wire off the switch. Trace the wire from the clutch switch to the ignition switch connector. Does the wire look good? Examine closely the connector and see if you see a burnt terminal, or some broken plastic in the connector, some way for the start wire to pick up current. If you see nothing wrong, IDK, probably will need a shop to chase the wiring down and find it. I don't know if a bad starter relay (stuck on) could do that, likely not if it only happens when you depress clutch and have clutch switch on.Good luck.

need new A/C controler in dash

Here is the firing order diagram for all Chevrolet V-8 engines for that year (note distributor latch positions between terminals 3 and 6 and 1 and 2) and let me know if you need any help to understand this diagram, or if you require any further assistance.

T.C.M. MODULE & WIRING HARNESS. GMC. $ 147.49 Chevrolet C1500 2WD PICKUP, 1991, 1992, 1993. Chevrolet ,you can see clearly what you need!Watch out because not necessarily is the TCM,If you put more details may be we are able to help you out!

So when you say 'it will not close' do you mean it won't stay latched or does it 'bang' as you attempt to close it and won't go into the opening all the way? The reason i ask as it could simply be the 'claw' is stuck in the 'closed' position IF the door bangs and doesn't want to go all the way into the cab opening. IF that's the case then you can use a screwdriver and while holding the exterior button like you're trying to open the door and use the screwdriver to 'flip the claw' of the latch to the open position. IF it closes into the opening but simply doesn't want to latch it MAY just need some lubrication. Spray it good with your favorite lube (WD40, etc) then work the 'claw' while activating the outside (or inside) button. If it still doesn't want to latch then chances are the spring inside of the latch mechanism is broken and the latch assembly will need to be replaced. I know you have a '91, which SHOULD possibly be the same as the old '73-'87 regular pickup. IF it's the 'new' body style (1988-1998) then the videos aren't going to be of help at all. These videos MAY help explain how things work and how the linkages clip onto the actual latch assembly; I hope this helps.

Actuator on front axle not working or unplugged ,,

Speedo cable is probably shot. They just get old and stop working right.

If you have a carb its chock .If injection its fuel related filters regulator restrictions if fuel flow ect.

Get a new light switch at LMC Truck parts: Truck Parts and Truck Accessories Truck Parts and Truck Accessories

Fuel pump is over heating. Replace the pump with a new one A/C Delco part only others have been known not to hold pressure. I know I have lived that nightmare. Again A/C Delco part only. Good luck.

you still have to check fuel pressure making sure your filter is good and pressure regulator and return fuel line clear from clogging also making sure your tps sensor commending advance timing and fuel at the same time

Need more info....this is a 3 quarter ton so is this a 7.3 diesel or a gas engine? There can be several problems with the Truck. There's 3 things that make the Truck run which is Spark, Compression & Gas. Sounds like you have Spark & Compression. I believe you have a fuel problem. Check both fuel filters & replace them. If you have a diesel its more than likely the filter as well!
Is there an Engine light on? Check the code if it is!

Hi Jamie: Since it starts I'd guess that the ignition system is OK. Maybe not great, but it's probably not the primary problem. - That leaves fuel as the major suspect. I'd try a dose of spry type carb cleaner and make sure that the fuel filter is not obstructed. The vehicle is over 25 years old so maintenance history is important, and at that age (and mileage) you can expect that components will be getting to the end of their service life. One consolation of owning an older vehicle is that you can always find a project to work on. Cheers.